Gruffudd Leiaf

[2][3][4] The reputed father of this earliest Gruffudd, Dafydd Gogh of Penmachno, was claimed by later genealogies to have been an illegitimate son of Dafydd ap Gruffydd, who briefly reigned as the last native Prince of Wales prior to his 1283 execution,[2][4] though no contemporary evidence of such a son survives.

Gruffudd Fychan had nine children by his wife Wladus ferch Gruffudd of Llifon, Anglesey, including sons Hywel Coetmor, Rhys Gethin, Robert and Gruffudd Leiaf, who with their father were accused in 1390 of preventing non-Welsh-speaking parson William Broun from taking up his parish at Llanrwst, and they were summoned before king Richard II of England and his council, so Gruffudd Leiaf and his brothers were presumably adults at the time.

[4] An englyn written by Gruffudd Leiaf survives in two copies, among the Cwrtmawr manuscripts and in the National Library of Wales.

A second work, a cywydd to the owl, has also been attributed to him by some manuscripts, though others attribute this work to other poets, his kinsmen Siôn Leiaf and Robert Leiaf, or the unrelated Daffydd ap Gwilym.

1585–1637) of Penmachno was also a reputed descendant of Daffydd Goch and hence akin to Gruffudd Leiaf.